/**
 * Copyright (C) 2010 David Simonek <dafesimonek@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package org.dafe.partyband.gui.concerts;

import java.util.List;
import java.util.Map;
import java.util.WeakHashMap;
import org.dafe.partyband.db.api.IConcert;
import org.dafe.partyband.db.api.ISong;
import org.dafe.partyband.db.api.queries.IConcertQuery;
import org.dafe.partyband.db.api.DbManager;

/**
 *
 * @author dafe
 */
public final class ConcertUtils {

    private static final IConcertQuery concertQuery = DbManager.getBandManager().getQueriesLookup().lookup(IConcertQuery.class);

    private static final Map<ISong, Boolean> isPlayedCache = new WeakHashMap<ISong, Boolean>();

    /**
     * @return true if given song is played for the very first time, i.e.
     * wasn't played at any concert in the past before given concert
     */
    public static boolean isPlayedFirst (ISong song, IConcert concert) {
        Boolean result = isPlayedCache.get(song);
        if (result != null) {
            return result;
        }

        List<? extends IConcert> concerts = concertQuery.getAllConcerts();
        result = true;
        for (IConcert curCon : concerts) {
            if (curCon.getDate().before(concert.getDate()) &&
                curCon.getSongs().contains(song)) {
                result = false;
                break;
            }
        }

        isPlayedCache.put(song, result);
        return result;
    }

    public static int getPlayedOnConcertsCount(ISong song) {
        int result = 0;
        List<? extends IConcert> concerts = concertQuery.getAllConcerts();
        for (IConcert curCon : concerts) {
            if (curCon.getSongs().contains(song)) {
                result++;
            }
        }
        return result;
    }

}
